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Dr. Halsey and Lieutenant Keyes meet 6 year old John on a playground in Elysium City on the planet Eridanus II.
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Project SPARTAN-II begins on Reach with 75 conscripts. The SPARTAN-II Program was an effort to produce elite soldiers through mechanical and biological augmentation.
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John makes squad leader.
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TREBUCHET, two four-man teams led by Staff Sergeants Nolan Byrne, and Avery J. Johnson infiltrate the city of Casbah on the outer colony of Tribute as ordered by Colonel Aboim.
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Contact with Harvest, an outer colony, is lost shortly after the colony itself had made contact with an unknown object.
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The SPARTANs undergo a radical series of biological, neurological, and physiological alterations. 30 die, 12 are disabled and 33 adapt.
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SPARTANs First official Mission, to infiltrate the rebel base on Eridanus to capture the rebel leader.
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The SPARTANs learn of the attack of the Covenant at Harvest and Project MJOLNIR commences.
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The outer colony of Eridanus II is destroyed by the Covenant.
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SPARTAN-051, Kurt, is covertly reassigned to ONI Section Three and tasked with secretly training a new generation of soldiers, the SPARTAN IIIs, assisted by CPO Mendez and under the authority of Colonel Ackerson. He is promoted to Lieutenant and is given the last name Ambrose.
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SPARTAN III Beta Company is delivered to Pegasi Delta onboard the All Under Heaven, beginning Operation TORPEDO, the destruction of a Covenant refinery. The operation is a success, although all but two of Beta Company, Tom and Lucy, are lost.
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The Pillar Of Autumn arrives at Halo.